High concentration topical insecticide containing insect growth regulator

Abstract

A topical insecticide is provided which can be safe to use and avoids many common deleterious side effects of conventional topical insecticides. The insecticide contains an insecticide and an insect growth regulator effective for killing fleas, flea larvae and flea eggs. The insecticide is formulated by dissolving an insecticidal (tetrahydro-3-furanyl) methylamine derivative and an insect growth regulator (IGR) in a solvent containing N-octyl pyrrolidone and/or N-methyl pyrrolidone to increase the solvency of the IGR component, thereby providing an insecticide having high insecticidal activity.

1. A liquid insecticide formulated by combining components, comprising, by weight:
 about 18% to 26% dinotefuran; 
 about 1% to 7% pyriproxyfen; 
 about 30% to 38% propylene carbonate; 
 about 30% to 94% N-methyl pyrrolidone; and 
 about 0.1% to 8% N-octyl pyrrolidone; 
 the liquid formulated so that the dinotefuran and pyriproxyfen remain in solution for over twenty-eight days when stored at a temperature under 4° C. 
 
     
     
       2. The insecticide of  claim 1 , comprising about 20% to 25% by weight dinotefuran. 
     
     
       3. The insecticide of  claim 1 , comprising about 2% to 4% by weight pyriproxyfen. 
     
     
       4. The insecticide of  claim 1 , comprising about 34% to 36% by weight N-methyl pyrrolidone. 
     
     
       5. The insecticide of  claim 1 , comprising about 5% to 7% by weight N-octyl pyrrolidone. 
     
     
       6. The insecticide of  claim 1 , comprising about 2% to 4% by weight pyriproxyfen, about 30% to 48% N-methyl pyrrolidone, and about 3% to 8% by weight of N-octyl pyrrolidone. 
     
     
       7. The insecticide of  claim 1 , comprising about 21% to 23% by weight dinotefuran, about 2% to 4% by weight pyriproxyfen, about 33% to 35% by weight propylene carbonate, about 34% to 36% by weight N-methyl pyrrolidone, and about 5% to 7% by weight N-octyl pyrrolidone. 
     
     
       8. A method of treating house pets, comprising applying an insecticidally effective amount of the insecticide of  claim 1  onto the pet. 
     
     
       9. The method of  claim 8 , wherein the insecticide is applied to the pet as a topical spot on the pet.